Infertility is in ability to conceive or inability to get pregnant after a year of unprotected intercourse. Infertility is often thought of as a female concern, but in fact in a third of cases it is because of male problems, such as a low sperm count. There are contributing factors which are leading cause of infertility. When the cause of infertility exists within the female spouse, it is referred to as female infertility and it contributes about 50% (one-third) of all infertility cases. the main causes of infertility in women are:

Damage to the fallopian tubes

fallopian tubes get damaged due to inflammation of the fallopian tube and pelvic inflammatory disease, usually caused by sexually transmitted infection, endometriosis or adhesions.

Endometriosis

it is caused when endometrial tissue implants and grows outside of the uterus which in turn affect the functioning of the ovaries, uterus and fallopian tubes.

Uterinal abnormalities

These are often associated with opening of the cervix or cervical mucus, or abnormalities in the shape or cavity of the uterus. Uterine fibroids which are basically benign tumors in the wall of the uterus may also cause infertility by blocking the fallopian tubes, these tumors may may distort the uterine cavity and thus cause  problems in implantation of the fertilized egg.

Ovulatory problems

Most women with ovulation problems have hormone imbalances. An example of a condition that causes a hormone imbalance is polycystic ovary syndrome (PCOS). Othe rovulation problems can start in the ovaries or in the pituitary gland and hypothalamus which regulate the menstrual cycle. These hormones are vital to normal ovulation.

Early Menopause

It is also known as Primary ovarian insufficiency characterised by a period when the ovaries stop working and menstruation ends before age 40. Although the cause is often unknown, certain conditions are associated with early menopause including immune system diseases, radiation or chemotherapy treatment, and smoking.

Other Factors

others factors also contributes in infertility. These factors may be:

age

After the age of 35, the women fertility become decrease. The biggest decrease in fertility begins during the mid-thirties. Among women who are 35, 95% will get pregnant after three years of having regular unprotected sex. For women who are 38, only 75% will get pregnant after three years of having regular unprotected sex.

Lifestyle and weight issues

Sedative lifestyle and being overweight may increase the risk of infertility. Moreover, those women who are having eating disorders such as anorexia or bulimia, and those women who have restrictive diet are at risk of infertility. Lack of or not enough exercise contributes to obesity, which increases the risk of infertility. Moreover, in women who are not overweight they may have ovulation problems which may be associated with frequent strenuous, intense exercise. Stress can also contribute in infertility in women.

Medical condition

Infertility may be associated with certain medical condition such as diabetes, epilepsy, and thyroid and bowel diseases. Moreover, gynaecological problems such as more than one miscarriage may leads to infertility.